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A321230
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Number of set partitions of [n^2] into n n-element subsets having the same sum.
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2
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OFFSET
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0,4
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LINKS
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FORMULA
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EXAMPLE
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a(0) = 1: empty.
a(1) = 1: 1.
a(2) = 1: 14|23.
a(3) = 2: 168|249|357, 159|267|348.
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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